function disableSubmit(whichButton) 
{ 
    if (document.getElementById) 
    { 
        // this is the way the standards work 
        document.getElementById(whichButton).disabled = true; 
    } 
    else if (document.all) 
    { 
        // this is the way old msie versions work 
        document.all[whichButton].disabled = true; 
    } 
    else if (document.layers) 
    { 
        // this is the way nn4 works 
        document.layers[whichButton].disabled = true; 
    } 
}